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https://github.com/jerryscript-project/jerryscript.git
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252d68936f
- Simplify small encoding - Better line info for some corner cases JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
117 lines
2.9 KiB
C
117 lines
2.9 KiB
C
/* Copyright JS Foundation and other contributors, http://js.foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ECMA_LINE_INFO_H
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#define ECMA_LINE_INFO_H
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/** \addtogroup ecma ECMA
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* @{
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*
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* \addtogroup ecmalineinfo Line info
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* @{
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*/
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#if JERRY_LINE_INFO
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#include "ecma-globals.h"
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/**
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* Increase the current value of line or column.
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*/
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#define ECMA_LINE_INFO_INCREASE 0x0
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/**
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* Decrease the current value of line or column.
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*/
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#define ECMA_LINE_INFO_DECREASE 0x1
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/**
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* Line update is present.
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*/
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#define ECMA_LINE_INFO_HAS_LINE 0x1
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/**
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* A default value for columns after a line update.
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*/
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#define ECMA_LINE_INFO_COLUMN_DEFAULT 127
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/**
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* Vlq encoding: flag which is set for all bytes except the last one.
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*/
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#define ECMA_LINE_INFO_VLQ_CONTINUE 0x80
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/**
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* Vlq encoding: mask to decode the number fragment.
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*/
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#define ECMA_LINE_INFO_VLQ_MASK 0x7f
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/**
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* Vlq encoding: number of bits stored in a byte.
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*/
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#define ECMA_LINE_INFO_VLQ_SHIFT 7
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/**
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* Small encoding: a value which represents a two byte long number.
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*/
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#define ECMA_LINE_INFO_ENCODE_TWO_BYTE (UINT8_MAX - 1)
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/**
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* Small encoding: minimum value of an encoded two byte long number.
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*/
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#define ECMA_LINE_INFO_ENCODE_TWO_BYTE_MIN (UINT8_MAX - 1)
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/**
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* Small encoding: a value which represents a three byte long number.
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*/
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#define ECMA_LINE_INFO_ENCODE_VLQ UINT8_MAX
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/**
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* Small encoding: minimum value of an encoded three byte long number.
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*/
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#define ECMA_LINE_INFO_ENCODE_VLQ_MIN (ECMA_LINE_INFO_ENCODE_TWO_BYTE_MIN + UINT8_MAX + 1)
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/**
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* Maximum number of line/column entries stored in a stream.
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*/
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#define ECMA_LINE_INFO_STREAM_VALUE_COUNT_MAX 48
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/**
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* Minimum size of a stream (except the last one).
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*/
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#define ECMA_LINE_INFO_STREAM_SIZE_MIN \
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((2 * ECMA_LINE_INFO_STREAM_VALUE_COUNT_MAX) - 1)
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/* Helper functions for parser/js/js-parser-line-info-create.c. */
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uint32_t ecma_line_info_decode_vlq (uint8_t **buffer_p);
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uint32_t ecma_line_info_difference_update (uint32_t current_value, uint32_t difference_value);
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/* General functions. */
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void ecma_line_info_free (uint8_t *line_info_p);
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void ecma_line_info_get (uint8_t *line_info_p, uint32_t offset,
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jerry_backtrace_location_t *location_p);
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#if JERRY_PARSER_DUMP_BYTE_CODE
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void ecma_line_info_dump (uint8_t *line_info_p);
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#endif /* JERRY_PARSER_DUMP_BYTE_CODE */
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#endif /* ECMA_LINE_INFO_H */
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/**
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* @}
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* @}
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*/
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#endif /* !ECMA_LINE_INFO_H */
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